{"id":45034,"date":"2023-10-24T15:57:14","date_gmt":"2023-09-23T15:40:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45034-2\/"},"modified":"2024-05-04T05:46:54","modified_gmt":"2024-05-03T21:46:54","slug":"45034-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45034-2\/","title":{"rendered":""},"content":{"rendered":"

\u6982\u8981<\/h1>\n

Rust\u3092\u8272\u3005\u89e6\u3063\u3066\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3092\u4f5c\u3063\u3066\u307f\u308b\u3002
\nRust\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/p>\n

\u79c1\u306f helpman \u3068\u3044\u3046\u30b3\u30de\u30f3\u30c9\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u305f\u3002\u73fe\u5728\u3001v1.0.4\u3002
\nhelp \u3084 man \u30b3\u30de\u30f3\u30c9\u306f\u60c5\u5831\u91cf\u304c\u591a\u3044\u306e\u3067\u3001\u72ec\u81ea\u306e\u30de\u30cb\u30e5\u30a2\u30eb\u3092\u65b0\u898f\u4f5c\u6210\u3001\u7de8\u96c6\u3001\u95b2\u89a7\u3067\u304d\u308b\u3082\u306e\u3092\u4f5c\u308a\u307e\u3057\u305f\u3002\u30b3\u30de\u30f3\u30c9\u306e\u8a73\u7d30\u306f\u5f8c\u65e5\u8f09\u305b\u307e\u3059\u3002<\/p>\n

Git Release
\nCrate.io<\/p>\n

\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h1>\n

\u79c1\u306e\u74b0\u5883\u306fMac(Intel)\u306a\u306e\u3067\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u53e9\u304f\u3002(Linux\u3082\u540c\u3058)<\/p>\n

% curl --proto '=https' --tlsv1.2 -sSf https:\/\/sh.rustup.rs | sh\r\n<\/code><\/pre>\n
Windows\u306f rustup-init.exe \u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3002\u4ee5\u964d\u306fMac\u3067\u306e\u8aac\u660e\u306e\u307f\u3002<\/p>\n
~\/.cargo\/bin\u914d\u4e0b\u306b\u30c4\u30fc\u30eb\u304c\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u308b\u3002
\nrustup, cargo, rustc\u306a\u3069\u304c\u3042\u308b\u3002<\/p>\n
% ls ~\/.cargo\/bin\/\r\ncargo*         cargo-fmt*     clippy-driver* rust-gdb*      rust-lldb*     rustdoc*       rustup*\r\ncargo-clippy*  cargo-miri*    rls*           rust-gdbgui*   rustc*         rustfmt*\r\n<\/code><\/pre>\n
\u30d0\u30fc\u30b8\u30e7\u30f3\u78ba\u8a8d<\/h3>\n
% source \"~\/.cargo\/env\"\r\n% rustc --version          \r\nrustc 1.66.0 (69f9c33d7 2022-12-12)\r\n% cargo --version\r\ncargo 1.66.0 (d65d197ad 2022-11-15)\r\n<\/code><\/pre>\n
\u66f4\u65b0<\/h3>\n
rustup update\u3067\u3067\u304d\u308b\u3002<\/p>\n
\u30a2\u30f3\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h3>\n
\u30a2\u30f3\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306frustup self uninstall\u3067\u5b9f\u884c\u3067\u304d\u308b\u3002<\/p>\n
Hello World<\/h1>\n
\u65e9\u901f\u3001Hello world\u3057\u3066\u307f\u308b\u3002
\n\u307e\u305a, main.rs \u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4f5c\u308b\u3002<\/p>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    println!<\/span>(<\/span>\"Hello World!\"<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u305d\u3057\u3066\u3001\u5b9f\u884c<\/p>\n
% rustc main.rs\r\n% .\/main       \r\nHello World!\r\n<\/code><\/pre>\n
Cargo<\/h1>\n
Cargo\u306fRust\u306e\u30d3\u30eb\u30c9\u30b7\u30b9\u30c6\u30e0\u517c\u30d1\u30c3\u30b1\u30fc\u30b8\u30de\u30cd\u30fc\u30b8\u30e3\u3002<\/p>\n
% cargo new hello_cargo\r\n     Created binary (application) `hello_cargo` package\r\n% tree .\r\n.\r\n\u2514\u2500\u2500 hello_cargo\r\n    \u251c\u2500\u2500 Cargo.toml\r\n    \u2514\u2500\u2500 src\r\n        \u2514\u2500\u2500 main.rs\r\n<\/code><\/pre>\n
\u4e3b\u306a\u30b3\u30de\u30f3\u30c9<\/h2>\n
cargo build<\/h3>\n
\u30d3\u30eb\u30c9\u3057\u3066\u5b9f\u884c\u3057\u3066\u307f\u308b\u3002<\/p>\n
% cargo build\r\n   Compiling hello_cargo v0.1.0 \r\n   (\/Users\/***\/rust\/cargo\/hello_cargo)\r\n    Finished dev [unoptimized + debuginfo] target(s) in 1.31s\r\n% .\/target\/debug\/hello_cargo\r\nHello, world!\r\n<\/code><\/pre>\n
\u30ea\u30ea\u30fc\u30b9\u6642\u306fcargo build –release\u3068\u3059\u308b\u3068\u3001\u6700\u9069\u5316\u3057\u3001target\/release\u306b\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u304c\u751f\u6210\u3055\u308c\u308b\u3002<\/p>\n
cargo run<\/h3>\n
cargo run\u3092\u4f7f\u3046\u3068\u3053\u308c\u3089\u3092\u4e00\u767a\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3067\u304d\u308b\u3002<\/p>\n
% cargo run\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.01s\r\n     Running `target\/debug\/hello_cargo`\r\nHello, world!\r\n<\/code><\/pre>\n
cargo check<\/h3>\n
cargo check\u3092\u3059\u308b\u3068\u5b9f\u884c\u3067\u304d\u308b\u304b\u3092\u77ac\u6642\u306b\u30c1\u30a7\u30c3\u30af\u3059\u308b\u3002
\n\u5b9f\u884c\u30d5\u30a1\u30a4\u30eb\u3092\u751f\u6210\u3057\u306a\u3044\u306e\u3067\u3001cargo build \u3088\u308a\u3082\u9ad8\u901f\u3002<\/p>\n
% cargo check\r\n    Checking hello_cargo v0.1.0 (\/Users\/Tomoki\/workspace\/rust\/cargo\/hello_cargo)\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.56s\r\n<\/code><\/pre>\n
cargo add<\/h3>\n
Cargo.toml\u306b\u81ea\u52d5\u3067\u8ffd\u8a18\u3057\u3066\u304f\u308c\u308b<\/p>\n
[dependencies]<\/span>\r\n+ <\/span>anyhow<\/span> =<\/span> \"1.0.68\"<\/span>\r\n<\/span><\/code><\/pre>\n
\u3053\u308c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u53e9\u304f\u3060\u3051\u3067\u3044\u3044\u3002<\/p>\n
% cargo add anyhow@0.1.41\r\n<\/code><\/pre>\n
\u30d5\u30a9\u30fc\u30de\u30c3\u30bf\u30fc<\/h2>\n
rustfmt \u3068 cargo-fmt\u3092\u4f7f\u3046\u3002(\u5143\u304b\u3089\u5165\u3063\u3066\u308b)
\n\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u53e9\u304f\u3068\u81ea\u52d5\u3067\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u3055\u308c\u308b\u3002<\/p>\n
cargo fmt\r\n<\/code><\/pre>\n
rustfix<\/h2>\n
\u81ea\u52d5\u3067warning\u3092\u4fee\u6b63\u3057\u3066\u304f\u308c\u308b\u3002<\/p>\n
% cargo fix\r\n<\/code><\/pre>\n
Linter<\/h2>\n
\u30ea\u30f3\u30bf\u30fc\u3067\u306fClippy\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308b\u3002<\/p>\n
% cargo clippy\r\n<\/code><\/pre>\n
\u578b<\/h1>\n
Rust\u306e\u6587\u5b57\u5217\u306e\u578b\u306b\u306f &str \u3068 String \u304c\u3042\u308b\u3002
\nRust\u3067\u306f &[T] \u306fslice\u3092\u8868\u3059\u306e\u3067\u3001&str\u306fu8\u306eslice\u3067\u3042\u308b\u3002
\n\u305d\u308c\u306b\u5bfe\u3057\u3066\u3001 String \u306fu8\u306eVector\u3067\u3042\u308b\u3002
\n\u3061\u306a\u307f\u306bString\u304b\u3089&str\u306b\u3059\u308b\u306b\u306f&\u3092\u3064\u3051\u308c\u3070\u3044\u3044\u3002<\/p>\n
\u578b\u3092\u51fa\u529b\u3059\u308b\u95a2\u6570print_type()\u3092\u4ee5\u4e0b\u306b\u8f09\u305b\u3066\u304a\u304f\u3002<\/p>\n
fn print_type<T>(_: T) {\r\n    println!(\"{}\", std::any::type_name::<T>());\r\n}\r\n<\/code><\/pre>\n
\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb<\/h1>\n
% cargo new grrs\r\n<\/code><\/pre>\n
\u5f15\u6570\u306f\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306estd::env::args()\u3092\u4f7f\u7528\u3059\u308b\u3002
\n\u5f15\u6570\u304c\u306a\u3044\u3068expect()\u306b\u6e21\u3057\u305f\u3082\u306e\u304c\u51fa\u529b\u3055\u308c\u308b\u3002<\/p>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> arg1<\/span> =<\/span> std<\/span>::<\/span>env<\/span>::<\/span>args<\/span>()<\/span>.nth<\/span>(<\/span>1<\/span>)<\/span>.expect<\/span>(<\/span>\"no arg1 given\"<\/span>);<\/span>\r\n    let<\/span> arg2<\/span> =<\/span> std<\/span>::<\/span>env<\/span>::<\/span>args<\/span>()<\/span>.nth<\/span>(<\/span>2<\/span>)<\/span>.expect<\/span>(<\/span>\"no arg2 given\"<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"arg1 : {}, arg2 : {}\"<\/span>,<\/span> arg1<\/span>,<\/span> arg2<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h2>\n
grrs % cargo run a b\r\narg1 : a, arg2 : b\r\n% cargo run a\r\nthread 'main' panicked at 'no arg2 given', src\/main.rs:3:40\r\nnote: run with `RUST_BACKTRACE=1` environment variable to display a backtrace\r\n% cargo run\r\nthread 'main' panicked at 'no arg1 given', src\/main.rs:2:43\r\nnote: run with `RUST_BACKTRACE=1` environment variable to display a backtrace\r\n<\/code><\/pre>\n
\n
\u74b0\u5883\u5909\u6570\u306fRUST_BACKTRACE\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3067\u304d\u308b
\nexport RUST_BACKTRACE=1
\nfull\u3082\u8a2d\u5b9a\u3067\u304d\u308b
\nexport RUST_BACKTRACE=full<\/p>\n<\/div>\n
\u69cb\u9020\u4f53\u3092\u4f7f\u3046<\/h2>\n
use<\/span> std<\/span>::<\/span>env<\/span>;<\/span>\r\n\r\nstruct<\/span> User<\/span> {<\/span>\r\n    name<\/span>:<\/span> String<\/span>,<\/span>\r\n    age<\/span>:<\/span> u8<\/span>,<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> arg1<\/span> =<\/span> env<\/span>::<\/span>args<\/span>()<\/span>.nth<\/span>(<\/span>1<\/span>)<\/span>.expect<\/span>(<\/span>\"name\u304c\u3042\u308a\u307e\u305b\u3093\"<\/span>);<\/span>\r\n    let<\/span> arg2<\/span> =<\/span> env<\/span>::<\/span>args<\/span>()<\/span>.nth<\/span>(<\/span>2<\/span>)<\/span>.expect<\/span>(<\/span>\"age\u304c\u3042\u308a\u307e\u305b\u3093\"<\/span>);<\/span>\r\n    let<\/span> args<\/span> =<\/span> User<\/span> {<\/span>\r\n        name<\/span>:<\/span> arg1<\/span>,<\/span>\r\n        age<\/span>:<\/span> arg2<\/span>.parse<\/span>()<\/span>.unwrap<\/span>()<\/span> \r\n    };<\/span>\r\n    println!<\/span>(<\/span>\r\n        \"name is {}, age is {}\"<\/span>,<\/span>\r\n        args<\/span>.name<\/span>,<\/span> args<\/span>.age<\/span>\r\n    )<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u51fa\u529b\u3059\u308b\u3068<\/p>\n
% cargo run Taro 18\r\nname is Taro, age is 18\r\n<\/code><\/pre>\n
[derive(Debug)]<\/h3>\n
#[derive(Debug)]\u3092\u4f7f\u3046\u3068\u69cb\u9020\u4f53\u3092fmt::Debug\u3067\u51fa\u529b\u3059\u308b<\/p>\n
use<\/span> std<\/span>::<\/span>env<\/span>;<\/span>\r\n\r\n#[derive(Debug)]<\/span>\r\nstruct<\/span> User<\/span> {<\/span>\r\n    name<\/span>:<\/span> String<\/span>,<\/span>\r\n    age<\/span>:<\/span> u8<\/span>,<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> arg1<\/span> =<\/span> env<\/span>::<\/span>args<\/span>()<\/span>.nth<\/span>(<\/span>1<\/span>)<\/span>.expect<\/span>(<\/span>\"name\u304c\u3042\u308a\u307e\u305b\u3093\"<\/span>);<\/span>\r\n    let<\/span> arg2<\/span> =<\/span> env<\/span>::<\/span>args<\/span>()<\/span>.nth<\/span>(<\/span>2<\/span>)<\/span>.expect<\/span>(<\/span>\"age\u304c\u3042\u308a\u307e\u305b\u3093\"<\/span>);<\/span>\r\n    let<\/span> args<\/span> =<\/span> User<\/span> {<\/span>\r\n        name<\/span>:<\/span> arg1<\/span>,<\/span>\r\n        age<\/span>:<\/span> arg2<\/span>.parse<\/span>()<\/span>.unwrap<\/span>()<\/span>\r\n    };<\/span>\r\n    println!<\/span>(<\/span>\"\u300c:?\u300d\u3092\u4f7f\u3063\u305f\u5834\u5408  {:?}\"<\/span>,<\/span> args<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"\u300c:#?\u300d\u3092\u4f7f\u3063\u305f\u5834\u5408 is {:#?}\"<\/span>,<\/span> args<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"\u300c1:?\u300d : {1:?}, \u300c0:?\u300d : {0:?}\"<\/span>,<\/span> args<\/span>.name<\/span>,<\/span> args<\/span>.age<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u51fa\u529b\u3059\u308b\u3068<\/p>\n
 % cargo run Taro 18\r\n\u300c:?\u300d\u3092\u4f7f\u3063\u305f\u5834\u5408  User { name: \"Taro\", age: 18 }\r\n\u300c:#?\u300d\u3092\u4f7f\u3063\u305f\u5834\u5408 is User {\r\n    name: \"Taro\",\r\n    age: 18,\r\n}\r\n\u300c1:?\u300d : 18, \u300c0:?\u300d : \"Taro\"\r\n<\/code><\/pre>\n
##clap<\/p>\n
Cargo.toml\u306bclap\u3092\u8ffd\u52a0\u3059\u308b\u3002<\/p>\n
[package]<\/span>\r\nname<\/span> =<\/span> \"grrs\"<\/span>\r\nversion<\/span> =<\/span> \"0.1.0\"<\/span>\r\nedition<\/span> =<\/span> \"2021\"<\/span>\r\n\r\n+ <\/span>[dependencies]<\/span>\r\n<\/span>+ <\/span>clap<\/span> =<\/span> {<\/span> version<\/span> =<\/span> \"4.0\"<\/span>,<\/span> features<\/span> =<\/span> [<\/span>\"derive\"<\/span>]<\/span> }<\/span>\r\n<\/span><\/code><\/pre>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306afoo.text\u3092\u7528\u610f\u3002<\/p>\n
abcd\r\n1234\r\npqrs\r\n9876\r\n<\/code><\/pre>\n
main.rs\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7de8\u96c6\u3059\u308b\u3002<\/p>\n
#![allow(unused)]<\/span>\r\nuse<\/span> clap<\/span>::<\/span>Parser<\/span>;<\/span>\r\n\r\n#[derive(Parser)]<\/span>\r\nstruct<\/span> Cli<\/span> {<\/span>\r\n    text<\/span>:<\/span> String<\/span>,<\/span>\r\n    file<\/span>:<\/span> std<\/span>::<\/span>path<\/span>::<\/span>PathBuf<\/span>,<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n    let<\/span> content<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>)<\/span>.expect<\/span>(<\/span>\"could not read file\"<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"input : {}\"<\/span>,<\/span> args<\/span>.text<\/span>);<\/span>\r\n    println!<\/span>(<\/span>\"file contents  : {}\"<\/span>,<\/span> content<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u3059\u308b\u3068\u30a8\u30e9\u30fc\u304c\u3044\u3044\u611f\u3058\u306b\u51fa\u529b\u3055\u308c\u308b\u3002
\n\u5f15\u6570\u306f–\u306e\u5f8c\u306b\u5165\u529b\u3059\u308b\u3002–\u306e\u4ee3\u308f\u308a\u306b main,\u3082\u3057\u304f\u306f\u7701\u7565\u3082\u53ef\u3002
\n\u305f\u3060\u3057\u3001–help\u306e\u6642\u306f\u7701\u7565\u4e0d\u53ef\u3002<\/p>\n
% cargo run                \r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.17s\r\n     Running `target\/debug\/grrs`\r\nerror: The following required arguments were not provided:\r\n  <TEXT>\r\n  <FILE>\r\n\r\nUsage: grrs <TEXT> <FILE>\r\n\r\nFor more information try '--help'\r\n% cargo run -- --help\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.08s\r\n     Running `target\/debug\/grrs --help`\r\nUsage: grrs <TEXT> <FILE>\r\n\r\nArguments:\r\n  <TEXT>  \r\n  <FILE>  \r\n\r\nOptions:\r\n  -h, --help  Print help information\r\n% cargo run -- hoge foo.txt\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.08s\r\n     Running `target\/debug\/grrs hoge foo.txt`\r\ninput : hoge\r\nfile contents  : abcd\r\n1234\r\npqrs\r\n9876\r\n<\/code><\/pre>\n
\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080<\/h2>\n
std::fs::read_to_string()\u3067\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u3001\uff11\u3064\u76ee\u306e\u5f15\u6570\u3092\u542b\u3080\u884c\u3092\u51fa\u529b\u3057\u3066\u3044\u308b\u3002<\/p>\n
#![allow(unused)]<\/span>\r\nuse<\/span> clap<\/span>::<\/span>Parser<\/span>;<\/span>\r\n\r\n#[derive(Parser)]<\/span>\r\nstruct<\/span> Cli<\/span> {<\/span>\r\n    text<\/span>:<\/span> String<\/span>,<\/span>\r\n    file<\/span>:<\/span> std<\/span>::<\/span>path<\/span>::<\/span>PathBuf<\/span>,<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n    let<\/span> content<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>)<\/span>.expect<\/span>(<\/span>\"could not read file\"<\/span>);<\/span>\r\n\r\n    for<\/span> line<\/span> in<\/span> content<\/span>.lines<\/span>()<\/span> {<\/span>\r\n        \/\/ text\u3092\u542b\u3080\u884c\u3092\u51fa\u529b<\/span>\r\n        if<\/span> line<\/span>.contains<\/span>(<\/span>&<\/span>args<\/span>.text<\/span>)<\/span> {<\/span>\r\n            println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> line<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h3>\n
% cargo run -- 98 foo.txt\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.09s\r\n     Running `target\/debug\/grrs 98 foo.txt`\r\n9876\r\n<\/code><\/pre>\n
match & unwrap & expect<\/h2>\n
file\u304c\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u6642\u306f unwrap \u3067 panic \u3092\u8d77\u3053\u3059\u304b
\nmatch \u3067\u660e\u793a\u7684\u306b\u30a8\u30e9\u30fc\u51e6\u7406\u3092\u884c\u3046\u3002
\nexpect \u3088\u308a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u512a\u308c\u3066\u3044\u308b\u3002<\/p>\n
match\u3092\u4f7f\u3063\u305f\u5834\u5408<\/h3>\n
#![allow(unused)]<\/span>\r\nuse<\/span> clap<\/span>::<\/span>Parser<\/span>;<\/span>\r\n\r\n#[derive(Parser)]<\/span>\r\nstruct<\/span> Cli<\/span> {<\/span>\r\n    text<\/span>:<\/span> String<\/span>,<\/span>\r\n    file<\/span>:<\/span> std<\/span>::<\/span>path<\/span>::<\/span>PathBuf<\/span>,<\/span>\r\n}<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n- <\/span>  let<\/span> content<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>)<\/span>.expect<\/span>(<\/span>\"could not read file\"<\/span>);<\/span>\r\n<\/span>+ <\/span>  let<\/span> result<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>);<\/span>\r\n<\/span>+ <\/span>  let<\/span> content<\/span> =<\/span> match<\/span> result<\/span> {<\/span>\r\n<\/span>+ <\/span>      Ok<\/span>(<\/span>content<\/span>)<\/span> =><\/span> content<\/span>,<\/span>\r\n<\/span>+ <\/span>      Err<\/span>(<\/span>error<\/span>)<\/span> =><\/span> {<\/span>\r\n<\/span>+ <\/span>          panic!<\/span>(<\/span>\"\u30a8\u30e9\u30fc\u5185\u5bb9 : {}\"<\/span>,<\/span> error<\/span>);<\/span>\r\n<\/span>+ <\/span>      }<\/span>\r\n<\/span>+ <\/span>  };<\/span>\r\n<\/span>    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> content<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h4>\n
% cargo run -- a a.txt\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.82s\r\n     Running `target\/debug\/grrs a a.txt`\r\nthread 'main' panicked at '\u30a8\u30e9\u30fc\u5185\u5bb9 : No such file or directory (os error 2)', src\/main.rs:21:13\r\nnote: run with `RUST_BACKTRACE=1` environment variable to display a backtrace\r\n<\/code><\/pre>\n
unwrap<\/h3>\n
unwrap\u3060\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7c21\u6f54\u306b\u304b\u3051\u308b\u3002<\/p>\n
\/\/***\u7701\u7565***<\/span>\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n+ <\/span>  let<\/span> content<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>)<\/span>.unwrap<\/span>();<\/span>\r\n<\/span>+ <\/span>  println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> content<\/span>);<\/span>\r\n<\/span>}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h4>\n
% cargo run a a.txt\r\n    Finished dev [unoptimized + debuginfo] target(s) in 1.04s\r\n     Running `target\/debug\/grrs a a.txt`\r\nthread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 2, kind: NotFound, message: \"No such file or directory\" }', src\/main.rs:12:55\r\nnote: run with `RUST_BACKTRACE=1` environment variable to display a backtrace\r\n<\/code><\/pre>\n
panic!\u3092\u8d77\u3053\u3055\u305a\u306b\u30a8\u30e9\u30fc\u3092\u51fa\u529b\u3059\u308b\u3053\u3068\u3082\u53ef\u80fd\u3002<\/p>\n
\/\/***\u7701\u7565***<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> -><\/span> Result<\/span><<\/span>(),<\/span> Box<\/span><<\/span>dyn<\/span> std<\/span>::<\/span>error<\/span>::<\/span>Error<\/span>>><\/span> {<\/span>\r\n    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n    let<\/span> result<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>);<\/span>\r\n    let<\/span> content<\/span> =<\/span> match<\/span> result<\/span> {<\/span>\r\n        Ok<\/span>(<\/span>content<\/span>)<\/span> =><\/span> content<\/span>,<\/span>\r\n        Err<\/span>(<\/span>error<\/span>)<\/span> =><\/span> {<\/span>\r\n            return<\/span> Err<\/span>(<\/span>error<\/span>.into<\/span>());<\/span>\r\n        }<\/span>\r\n    };<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> content<\/span>);<\/span>\r\n    Ok<\/span>(())<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h4>\n
% cargo run a a.txt\r\n    Finished dev [unoptimized + debuginfo] target(s) in 1.39s\r\n     Running `target\/debug\/grrs a a.txt`\r\nError: Os { code: 2, kind: NotFound, message: \"No such file or directory\" }\r\n<\/code><\/pre>\n
\n
Ok(())\u3092Ok(());\u3068\u3057\u3066\u306f\u3044\u3051\u307e\u305b\u3093\u3002
\n\u623b\u308a\u5024\u306e\u3042\u308b\u95a2\u6570\u306freturn\u3092\u660e\u793a\u3057\u3066\u3044\u306a\u3044\u6700\u7d42\u884c\u3067;\u306f\u3064\u3051\u3066\u306f\u3044\u3051\u306a\u3044<\/p>\n<\/div>\n
\u300c?\u300d \u3092\u4f7f\u3063\u305f\u3089\u3082\u3063\u3068\u7c21\u6f54\u306b\u304b\u3051\u308b<\/h3>\n
fn<\/span> main<\/span>()<\/span> -><\/span> Result<\/span><<\/span>(),<\/span> Box<\/span><<\/span>dyn<\/span> std<\/span>::<\/span>error<\/span>::<\/span>Error<\/span>>><\/span> {<\/span>\r\n    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n    let<\/span> content<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>)<\/span>?<\/span>;<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> content<\/span>);<\/span>\r\n    Ok<\/span>(())<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h4>\n
% cargo run a a.txt\r\n    Finished dev [unoptimized + debuginfo] target(s) in 1.52s\r\n     Running `target\/debug\/grrs a a.txt`\r\nError: Os { code: 2, kind: NotFound, message: \"No such file or directory\" }\r\n<\/code><\/pre>\n
\u300c?\u300d\u3092\u4f7f\u3063\u305f\u3068\u304d\u306e\u30a8\u30e9\u30fc\u306e\u30ab\u30b9\u30bf\u30de\u30a4\u30ba<\/h3>\n
\/\/ ***\u7701\u7565***<\/span>\r\n#[derive(Debug)]<\/span>\r\nstruct<\/span> CustomError<\/span>(<\/span>String<\/span>);<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> -><\/span> Result<\/span><<\/span>(),<\/span> CustomError<\/span>><\/span> {<\/span>\r\n    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n    let<\/span> content<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>)<\/span>\r\n        .map_err<\/span>(|<\/span>err<\/span>|<\/span> CustomError<\/span>(<\/span>format!<\/span>(<\/span>\"\u30a8\u30e9\u30fc\u5185\u5bb9: `{}`: {}\"<\/span>,<\/span> args<\/span>.file<\/span>.display<\/span>(),<\/span> err<\/span>)))<\/span>?<\/span>;<\/span>\r\n\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> content<\/span>);<\/span>\r\n    Ok<\/span>(())<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h4>\n
% cargo run a a.txt\r\n   Compiling grrs v0.1.0 (\/Users\/Tomoki\/workspace\/rust\/cargo\/grrs)\r\n    Finished dev [unoptimized + debuginfo] target(s) in 1.42s\r\n     Running `target\/debug\/grrs a a.txt`\r\nError: CustomError(\"\u30a8\u30e9\u30fc\u5185\u5bb9: `a.txt`: No such file or directory (os error 2)\")\r\n<\/code><\/pre>\n
anyhow<\/h2>\n
anyhow\u3092\u4f7f\u3046\u3068\u3082\u3063\u3068\u30b9\u30de\u30fc\u30c8\u306b\u304b\u3051\u308b\u3002
\n\u307e\u305a\u3001Cargo.toml\u306b\u8ffd\u52a0\u3059\u308b\u3002<\/p>\n
[dependencies]<\/span>\r\nclap<\/span> =<\/span> {<\/span> version<\/span> =<\/span> \"4.0\"<\/span>,<\/span> features<\/span> =<\/span> [<\/span>\"derive\"<\/span>]<\/span> }<\/span>\r\n+ <\/span>anyhow<\/span> =<\/span> \"1.0\"<\/span>\r\n<\/span><\/code><\/pre>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b main.rs\u3000\u3092\u4fee\u6b63\u3002<\/p>\n
#![allow(unused)]<\/span>\r\n+ <\/span>use<\/span> anyhow<\/span>::{<\/span>Context<\/span>,<\/span> Result<\/span>};<\/span>\r\n<\/span>use<\/span> clap<\/span>::<\/span>Parser<\/span>;<\/span>\r\n\r\n\/\/ ***\u7701\u7565***<\/span>\r\n\r\n#[derive(Debug)]<\/span>\r\nstruct<\/span> CustomError<\/span>(<\/span>String<\/span>);<\/span>\r\n+ <\/span>fn<\/span> main<\/span>()<\/span> -><\/span> Result<\/span><<\/span>()<\/span>><\/span> {<\/span>\r\n<\/span>    let<\/span> args<\/span> =<\/span> Cli<\/span>::<\/span>parse<\/span>();<\/span>\r\n+ <\/span>  let<\/span> content<\/span> =<\/span> std<\/span>::<\/span>fs<\/span>::<\/span>read_to_string<\/span>(<\/span>&<\/span>args<\/span>.file<\/span>)<\/span>\r\n<\/span>+ <\/span>      .with_context<\/span>(||<\/span> format!<\/span>(<\/span>\"\u30a8\u30e9\u30fc\u5185\u5bb9 : {}\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\"<\/span>,<\/span> args<\/span>.file<\/span>.display<\/span>()))<\/span>?<\/span>;<\/span>\r\n<\/span>\r\n    println!<\/span>(<\/span>\"{}\"<\/span>,<\/span> content<\/span>);<\/span>\r\n    Ok<\/span>(())<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h4>\n
% cargo run a a.txt\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.82s\r\n     Running `target\/debug\/grrs a a.txt`\r\nError: \u30a8\u30e9\u30fc\u5185\u5bb9 : a.txt\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\r\n\r\nCaused by:\r\n    No such file or directory (os error 2)\r\n<\/code><\/pre>\n
output<\/h2>\n
eprintln!<\/h3>\n
println!\u306f\u6a19\u6e96\u51fa\u529b\u3001eprintln!\u306f\u6a19\u6e96\u30a8\u30e9\u30fc\u51fa\u529b\u3067\u3042\u308b\u3002<\/p>\n
\u9ad8\u901f\u306a\u6a19\u6e96\u51fa\u529b<\/h3>\n
\u666e\u901a\u306eprintln!<\/h4>\n
fn<\/span> main<\/span>()<\/span> {<\/span>\r\n    for<\/span> _<\/span> in<\/span> 0<\/span>..<\/span>10_000_000<\/span> {<\/span>\r\n        println!<\/span>(<\/span>\"\"<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u901f\u5ea6\u3092\u8a08\u6e2c\u3059\u308b\u3068 3.97s<\/p>\n
% time cargo run > \/dev\/null\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.08s\r\n     Running `target\/debug\/grrs`\r\ncargo run > \/dev\/null  3.97s user 3.18s system 97% cpu 7.358 total\r\n<\/code><\/pre>\n
writeln!<\/h4>\n
use<\/span> std<\/span>::<\/span>io<\/span>::{<\/span>stdout<\/span>,<\/span> Write<\/span>};<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> out<\/span> =<\/span> stdout<\/span>();<\/span>\r\n    let<\/span> mut<\/span> out<\/span> =<\/span> out<\/span>.lock<\/span>();<\/span>\r\n    for<\/span> _<\/span> in<\/span> 0<\/span>..<\/span>10_000_000<\/span> {<\/span>\r\n        writeln!<\/span>(<\/span>out<\/span>,<\/span> \"\"<\/span>)<\/span>.unwrap<\/span>();<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u901f\u5ea6\u306f 3.72s \u3068\u306a\u308a\u5c11\u3057\u901f\u304f\u306a\u3063\u305f\u3002<\/p>\n
% time cargo run > \/dev\/null\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.08s\r\n     Running `target\/debug\/grrs`\r\ncargo run > \/dev\/null  3.72s user 3.12s system 97% cpu 7.008 total\r\n<\/code><\/pre>\n
write!<\/h4>\n
writeln! \u306e\u4ee3\u308f\u308a\u306b write! \u3092\u4f7f\u3046\u3002<\/p>\n
use<\/span> std<\/span>::<\/span>io<\/span>::{<\/span>stdout<\/span>,<\/span> Write<\/span>};<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> out<\/span> =<\/span> stdout<\/span>();<\/span>\r\n    let<\/span> mut<\/span> out<\/span> =<\/span> out<\/span>.lock<\/span>();<\/span>\r\n    for<\/span> _<\/span> in<\/span> 0<\/span>..<\/span>10_000_000<\/span> {<\/span>\r\n        write!<\/span>(<\/span>out<\/span>,<\/span> \"\"<\/span>)<\/span>.unwrap<\/span>();<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u901f\u5ea6\u306f 0.53s \u3068\u6570\u500d\u901f\u304f\u306a\u3063\u305f\u3002<\/p>\n
% time cargo run > \/dev\/null\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.08s\r\n     Running `target\/debug\/grrs`\r\ncargo run > \/dev\/null  0.53s user 0.03s system 77% cpu 0.732 total\r\n<\/code><\/pre>\n
\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0<\/h4>\n
\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3055\u308c\u306a\u3044\u306e\u3067\u3001\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u3057\u3066\u3042\u3052\u308b\u3002<\/p>\n
#![allow(unused)]<\/span>\r\nuse<\/span> std<\/span>::<\/span>io<\/span>::{<\/span>stdout<\/span>,<\/span> BufWriter<\/span>,<\/span> Write<\/span>};<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> stdout<\/span> =<\/span> stdout<\/span>();<\/span>\r\n    let<\/span> mut<\/span> handle<\/span> =<\/span> BufWriter<\/span>::<\/span>new<\/span>(<\/span>stdout<\/span>);<\/span> \/\/ optional: wrap that handle in a buffer<\/span>\r\n    for<\/span> _<\/span> in<\/span> 0<\/span>..<\/span>10_000_000<\/span> {<\/span>\r\n        writeln!<\/span>(<\/span>handle<\/span>,<\/span> \"foo\"<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u901f\u5ea6\u306f 0.94s<\/p>\n
% time cargo run > \/dev\/null\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.08s\r\n     Running `target\/debug\/grrs`\r\ncargo run > \/dev\/null  0.94s user 0.03s system 85% cpu 1.143 total\r\n<\/code><\/pre>\n
\u307e\u305f\u30d0\u30c3\u30d5\u30a1\u30ea\u30f3\u30b0\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3082\u66f8\u3051\u308b\u3002<\/p>\n
use<\/span> std<\/span>::<\/span>io<\/span>::{<\/span>stdout<\/span>,<\/span> Write<\/span>,<\/span> BufWriter<\/span>};<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> out<\/span> =<\/span> stdout<\/span>();<\/span>\r\n    let<\/span> mut<\/span> out<\/span> =<\/span> BufWriter<\/span>::<\/span>new<\/span>(<\/span>out<\/span>.lock<\/span>());<\/span>\r\n    for<\/span> _<\/span> in<\/span> 0<\/span>..<\/span>10_000_000<\/span> {<\/span>\r\n        writeln!<\/span>(<\/span>out<\/span>,<\/span> \"\"<\/span>)<\/span>.unwrap<\/span>();<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3053\u3061\u3089\u3082\u901f\u5ea6\u306f 0.94s \u3068\u306a\u308b\u3002<\/p>\n
% time cargo run > \/dev\/null\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.08s\r\n     Running `target\/debug\/grrs`\r\ncargo run > \/dev\/null  0.94s user 0.04s system 85% cpu 1.138 total\r\n<\/code><\/pre>\n
Progress bar<\/h2>\n
Cargo.toml\u306b indicatif \u3092\u8ffd\u8a18\u3002<\/p>\n
[dependencies]<\/span>\r\n+ <\/span>indicatif<\/span> =<\/span> {<\/span>version<\/span> =<\/span> \"*\"<\/span>,<\/span> features<\/span> =<\/span> [<\/span>\"rayon\"<\/span>]}<\/span>\r\n<\/span><\/code><\/pre>\n
main.rs\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7de8\u96c6\u3002<\/p>\n
#![allow(unused)]<\/span>\r\nuse<\/span> indicatif<\/span>::<\/span>ProgressBar<\/span>;<\/span>\r\n\r\nfn<\/span> main<\/span>()<\/span> {<\/span>\r\n    let<\/span> pb<\/span> =<\/span> ProgressBar<\/span>::<\/span>new<\/span>(<\/span>100_000_000<\/span>);<\/span>\r\n    for<\/span> i<\/span> in<\/span> 0<\/span>..<\/span>100_000_000<\/span> {<\/span>\r\n        pb<\/span>.inc<\/span>(<\/span>1<\/span>);<\/span>\r\n    }<\/span>\r\n    pb<\/span>.finish_with_message<\/span>(<\/span>\"done\"<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u3053\u308c\u3092\u5b9f\u884c\u3059\u308b\u3068\u30d7\u30ed\u30b0\u30ec\u30b9\u30d0\u30fc\u304c\u51fa\u3066\u304f\u308b\u3002<\/p>\n
% cargo run\r\n    Finished dev [unoptimized + debuginfo] target(s) in 0.12s\r\n     Running `target\/debug\/grrs`\r\n\u2588\u2588\u2588\u2588\u2588\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591\u2591 11674248\/100000000\r\n<\/code><\/pre>\n
Logging<\/h2>\n
Cargo.toml\u306b env_logger \u3068 log \u3092\u8ffd\u8a18\u3059\u308b\u3002<\/p>\n
[dependencies]<\/span>\r\n+ <\/span>env_logger<\/span> =<\/span> \"0.9.0\"<\/span>\r\n<\/span>+ <\/span>log<\/span> =<\/span> \"0.4\"<\/span>\r\n<\/span><\/code><\/pre>\n
src\/bin\/output-log.rs\u3092\u4f5c\u6210<\/p>\n
use log::{info, warn};\r\nuse env_logger;\r\n\r\nfn main() {\r\n    env_logger::init();\r\n    info!(\"starting up\");\r\n    warn!(\"oops, nothing implemented!\");\r\n}\r\n<\/code><\/pre>\n
\u5b9f\u884c\u7d50\u679c<\/h4>\n
log level\u306f error, warn, info, debug, trace\u304c\u3042\u308b\u3002<\/p>\n
% env RUST_LOG=info cargo run --bin output-log\r\n    Finished dev [unoptimized + debuginfo] target(s) in 1.15s\r\n     Running `target\/debug\/log`\r\n[2023-01-02T08:20:40Z INFO  log] starting up\r\n[2023-01-02T08:20:40Z WARN  log] oops, nothing implemented!\r\n<\/code><\/pre>\n
\u30af\u30ed\u30b9\u30b3\u30f3\u30d1\u30a4\u30e9<\/h1>\n
\u30af\u30ed\u30b9\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6bd4\u8f03\u306b\u3064\u3044\u3066\u306f Rust \u3067\u30d0\u30a4\u30ca\u30ea\u3092\u914d\u5e03\u3059\u308b \u304c\u3088\u304f\u307e\u3068\u307e\u3063\u3066\u3044\u305f\u3002<\/p>\n
cross<\/h2>\n
\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/p>\n
\u307e\u305a\u306f\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3002<\/p>\n
cargo install cross --git https:\/\/github.com\/cross-rs\/cros\r\n<\/code><\/pre>\n
\u4ee5\u4e0b\u306e2\u3064\u306e\u30b3\u30de\u30f3\u30c9\u306e\u3069\u3061\u3089\u304b\u3092\u53e9\u304f\u3068\u5bfe\u8c61\u306e\u74b0\u5883\u306e\u30ea\u30b9\u30c8\u304c\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n
rustc --print target-list\r\nrustup target list\r\n<\/code><\/pre>\n
\u4f8b\u3048\u3070<\/p>\n
\/\/ Linux\u306e\u5834\u5408\r\n% cross build --target x86_64-unknown-linux-gnu\r\n\/\/ Windows\u306e\u5834\u5408\r\n% cross build --target x86_64-pc-windows-gnu\r\n\/\/ Mac (m1\u306e\u5834\u5408)\r\n$ rustup target add aarch64-apple-darwin               \r\n$ cross build --target aarch64-apple-darwin\r\n<\/code><\/pre>\n
CentOS7<\/h2>\n
centOS7\u306fglibc\u304c2.28\u3067\u306f\u306a\u304f\u30012.27\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u4e0a\u8a18\u306e\u65b9\u6cd5\u3060\u3068\u30a8\u30e9\u30fc\u304c\u51fa\u308b\u3002
\ncross\u3067\u3082\u4ee5\u4e0b\u306e\u3088\u3046\u306bCross.toml\u306b\u8ffd\u52a0\u3057\u305f\u3089\u3044\u3051\u308b\u3089\u3057\u3044\u3002\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306b\u8a18\u8f09\u3002<\/p>\n
[target.x86_64-unknown-linux-gnu]<\/span>\r\nimage<\/span> =<\/span> \"ghcr.io\/cross-rs\/x86_64-unknown-linux-gnu:main-centos\"<\/span>\r\n<\/code><\/pre>\n
\u4eca\u56de\u306fcargo zigbuild\u3092\u4f7f\u3046\u3002
\n\u4e8b\u524d\u306b zig \u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u304a\u304b\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/p>\n
% rustup target add x86_64-unknown-linux-gnu\r\n% brew install zig\r\n% cargo zigbuild --target=x86_64-unknown-linux-gnu.2.17\r\n<\/code><\/pre>\n
\u30d0\u30a4\u30ca\u30ea\u914d\u5e03\u65b9\u6cd5<\/h1>\n
Git Release<\/h2>\n
\u4e00\u756a\u624b\u3063\u53d6\u308a\u65e9\u3044\u3002
\n\u3057\u304b\u3057\u3001\u914d\u5e03\u65b9\u6cd5\u304c\u57fa\u672c\u7684\u306b.tar.gz\u304b.zip\u306a\u306e\u3067\u89e3\u51cd\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002
\n\u307e\u305f\u3001Pass\u3092\u901a\u3059\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u3001\u9762\u5012\u3067\u3042\u308b\u3002<\/p>\n
brew<\/h2>\n
homebrew (tap)
\ntap\u3092\u5229\u7528\u305b\u305a\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u305b\u305f\u3044\u5834\u5408\u306f\u3001 homebrew-core \u306b\u5bfe\u3057\u3066pull request\u3092\u9001\u3063\u3066\u53d6\u308a\u8fbc\u3093\u3067\u3082\u3089\u3046\u3053\u3068\u3067\u53ef\u80fd\u306b\u306a\u308b\u3002 \u3044\u304f\u3064\u304b\u306e\u30eb\u30fc\u30eb \u3092\u6e80\u305f\u3059\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n
\u305d\u306e\u4ed6<\/h2>\n
\u4ee3\u8868\u7684\u306a\u30d1\u30c3\u30b1\u30fc\u30b8\u30de\u30cd\u30fc\u30b8\u30e3\u3092\u6319\u3052\u3066\u304a\u304f\u3002<\/p>\n
    \n
  • \n
      rpm<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          yum<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            dpkg<\/ul>\n
            \u53c2\u8003\u6587\u732e<\/h1>\n
            \u30b3\u30de\u30f3\u30c9\u30c4\u30fc\u30eb\u3092\u4f5c\u308b\u969b\u306b\u304a\u4e16\u8a71\u306b\u306a\u3063\u305f\u8a18\u4e8b\u3002<\/p>\n
              \n
            1. \n
                Rust\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/ol>\n<\/li>\n<\/ol>\n
                 <\/p>\n
                  \n
                1. \n
                    The Rust Programming Language \u65e5\u672c\u8a9e\u7248<\/ol>\n<\/li>\n<\/ol>\n
                    Git-clippy
                    \n\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u3068\u304d\u306e RUST_BACKTRACE=1 \u3092\u8a2d\u5b9a\u3059\u308b
                    \n&str\u3068String\u3092\u7406\u89e3\u3057\u3088\u3046\u3068\u601d\u3063\u305f\u3089slice\u3084mut\u3092\u7406\u89e3\u3067\u304d\u3066\u306a\u3044\u3053\u3068\u306b\u6c17\u3065\u3044\u305f\u8a71
                    \nRust\u306e\u30c7\u30fc\u30bf\u578b
                    \n\u547d\u540d
                    \nrust String &str \u306e\u5909\u63db\u3068\u3001\u6587\u5b57\u5217 \u6570\u5024 \u306e\u5909\u63db
                    \nRust\u306e\u6240\u6709\u6a29\u306b\u3064\u3044\u3066
                    \nexpect()\u3088\u308aunwrap_or_else()\u3092\u4f7f\u3046\u3079\u304d\u5834\u5408
                    \nRust \u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30b7\u30e5\u30ac\u30fc\u304c\u8c4a\u5bcc\u3067\u5b8c\u5168\u306b\u521d\u898b\u6bba\u3057\u306a\u306e\u3067\u81ea\u4fe1\u3092\u6301\u3063\u3066\u4f7f\u3048\u308b\u3088\u3046\u306b\u6574\u7406\u3057\u3066\u307f\u305f\u3089\u5b8c\u5168\u306b\u7406\u89e3\u3057\u305f
                    \nRust\u306e\u884c\u672b\u30bb\u30df\u30b3\u30ed\u30f3\u306f\u3044\u308b\u306e\u304b\u3044\u3089\u306a\u3044\u306e\u304b
                    \nRust\u306e\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u89e3\u6790\u30e9\u30a4\u30d6\u30e9\u30ea\u300eClap\u300f \u301c\u5c0e\u5165\u7de8\u301c
                    \nRust\u3067\u624b\u8efd\u306bCLI\u30c4\u30fc\u30eb\u3092\u4f5c\u308c\u308bclap\u3092\u8efd\u304f\u7d39\u4ecb\u3059\u308b
                    \nRust \u3067 derive(Debug) \u3092\u5b89\u5fc3\u3057\u3066\u4f7f\u3046\u305f\u3081\u306b\u79d8\u533f\u60c5\u5831\u3092\u30de\u30b9\u30af\u3059\u308b
                    \nRust\u3067\u9ad8\u901f\u306a\u6a19\u6e96\u51fa\u529b
                    \nRust\uff1alog\u3067\u30ed\u30b0\u51fa\u529b\u3092\u884c\u3046
                    \nRust \u306e\u30a8\u30e9\u30fc\u30cf\u30f3\u30c9\u30ea\u30f3\u30b0\u306f\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u30b7\u30e5\u30ac\u30fc\u304c\u8c4a\u5bcc\u3067\u5b8c\u5168\u306b\u521d\u898b\u6bba\u3057\u306a\u306e\u3067\u81ea\u4fe1\u3092\u6301\u3063\u3066\u4f7f\u3048\u308b\u3088\u3046\u306b\u6574\u7406\u3057\u3066\u307f\u305f\u3089\u5b8c\u5168\u306b\u7406\u89e3\u3057\u305f
                    \nRust\u306eCLI\u4f5c\u6210\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3084\u3063\u3066\u3044\u308b\u4e2d\u306e\u30e1\u30e2\u66f8\u304d
                    \nclap v3 \u306edrive\u30d9\u30fc\u30b9\u306e\u30d1\u30fc\u30b9\u306e\u30b5\u30f3\u30d7\u30eb
                    \nRust \u306b\u304a\u3051\u308b From \u3068\u304b Into \u3068\u304b\u306e\u8003\u3048\u65b9
                    \nstd::any::type_name \u306f\u30d0\u30c3\u30c1\u30ea\u578b\u540d\u3092\u8fd4\u3057\u3066\u304f\u308c\u308b\u308f\u3051\u3067\u306f\u306a\u3055\u305d\u3046
                    \nRust\u5165\u9580
                    \nRust \u3092\u59cb\u3081\u308b\u6642\u306b\u5c11\u3057\u3060\u3051\u8aad\u307f\u66f8\u304d\u3057\u3084\u3059\u304f\u306a\u308b Result \u3068 Option \u306e\u8a71
                    \nRust \u3067\u30d0\u30a4\u30ca\u30ea\u3092\u914d\u5e03\u3059\u308b
                    \nRust\u3067Windows\u21d4Linux\u3092\u30af\u30ed\u30b9\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b
                    \nRust \u3067\u30d0\u30a4\u30ca\u30ea\u3092\u914d\u5e03\u3059\u308b<\/p>\n","protected":false},"excerpt":{"rendered":"
                    \u6982\u8981 Rust\u3092\u8272\u3005\u89e6\u3063\u3066\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3092\u4f5c\u3063\u3066\u307f\u308b\u3002 Rust\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 \u79c1\u306f helpman  […]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45034","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/45034-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u6982\u8981 Rust\u3092\u8272\u3005\u89e6\u3063\u3066\u30b3\u30de\u30f3\u30c9\u30e9\u30a4\u30f3\u30c4\u30fc\u30eb\u3092\u4f5c\u3063\u3066\u307f\u308b\u3002 Rust\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 \u79c1\u306f helpman […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45034-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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